Pneumatic Relay

Ep-8000 Series electro-pneumatic transducers convert a voltage or current signal from an electronic controller into a Pneumatic output pressure signal. An increase or decrease in the input signal proportionally increases or decreases (respectively) the output pressure signal from the ep-8000. Four models are available, which are grouped into two basic versions: Low-volume output units (non-relay) and high-volume output units (relay). made in United States. Manufactured by Johnson Controls.

This positioning relay is a compact, pneumatic device designed to provide positive positioning of a pneumatic valve or damper actuator. The positioner provides Supply air pressure against the actuator diaphragm to initiate stem or shaft movement. The actuator spring reverses the stem or shaft movement. The positioning relay is recommended for damper actuator and valve applications where rapid speed of response and/or repeatability of stem position is needed to obtain good system operation. It can be used to reduce the span of controlled devices to permit sequencing. It can also be used to increase the close-off force of a normally open actuator without affecting its spring span, because the positioner uses full Supply air pressure to position the actuator. The spring range of the actuator does not affect the operation of the positioner. Therefore, it is recommended that an actuator with a high spring range, such as 8 psig to 13 psig (55 kPa to 90 kPa), be selected. This combination has the high return force of the actuator spring, plus the high forward force available from the positioner.

It's 9999 minutes. while setting four values of time , long press SET key for 2 second can convert units into seconds or minutes, the right bit decimal point bright means minutes of units 1. Digital LED display, set by three buttons, easy to use, has reset function. 2. High-performance microcontrollers, industrial-grade reliability, high process stability, low power, digital display can be shut automatically, the minimum operating current at 7mA/12V, with reverse power protection , surge current shock protection . 3. Each group of relay has common and normally open, normally close contacts, two sets of conversion; 4. 30 groups time, each timer range: 0.1 seconds ~ 9999 minutes adjustable, the total number of cycles are adjustable from 0 to 9999 ( "0" means run loops all the time ) ; 5. High level signal trigger launch, or forcing relay close/open; 6. All settings can be saved. Parameter: Timing Range : 0.1seconds ~ 9999 minutes can be set, cycles 0 ~ 9999 times Operating power: DC DC18~28V Relay parameters: Coil voltage: DC 24V Two set of conversion (normally open and normally closed) Contact load: 10A/277V AC or 10A/30V DC Contact resistance: ≤ 100mΩ(1A 6VDC) Mechanical durability: 10 millions Electricity durability: > 100,000 (10A-250VAC) Operating Temperatur...

Energy Production Systems Engineering presents IEEE, Electrical Apparatus Service Association (EASA), and International Electrotechnical Commission (IEC) standards of engineering systems and equipment in utility electric generation stations. Includes fundamental combustion reaction equations Provides methods for measuring radioactivity and exposure limits Includes IEEE, American Petroleum Institute (API), and National Electrical Manufacturers Association (NEMA) standards for motor applications Introduces the IEEE C37 series of standards, which describe the proper selections and applications of switchgear Describes how to use IEEE 80 to calculate the touch and step potential of a ground grid design This book enables engineers and students to acquire through study the pragmatic knowledge and skills in the field that could take years to acquire through experience alone.